Advertisements
Advertisements
प्रश्न
Distinguish between the resistivity and conductivity of a conductor.
उत्तर
| Resistivity | Conductivity |
| 1. It is the resistance of a conductor of unit length and unit area of cross-section. | 1. It is the reciprocal of the electrical resistivity of a material. |
| 2. Its unit is ohm metre | 2. Its unit is ohm-1 meter-1 or mho metre-1 |
| 3. It is the measure of the resisting power of a specified material to the passage of an electric current. | 3. It is the measure of its ability to pass the current through it. |
APPEARS IN
संबंधित प्रश्न
S.I. unit of Electrical conductivity of a conductor is ______.
To get 2 Ω resistance using only 6 Ω resistors, the number of them required is:
The electrical resistance of insulators is ____________.
The proper representation of series combination of cells obtaining maximum potential is
 |
 |
 |
 |
| (i) | (ii) | (iii) | (iv) |
If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be
In the given circuit determine the value of:
- Total resistance of the circuit
- Current flowing through the ammeter.
Write the relationship between electrical resistance and electrical resistivity for a metallic conductor of a cylindrical shape. Hence derive the SI unit of electrical resistivity.
Name a substance which the specific resistance remains almost unchanged by the increase in temperature.
State the order of specific resistance of a metal.
State the order of specific resistance of a semiconductor.
